wrote in message
oups.com...
I have a manual bilge pump in a Newport 27, and
would like to add an automatic electric one.

What is the easiest way to do this? Can I use
(at least some) of the hoses that the mechanical
membrane pump uses?

The membrane pump is mounted in the back of the
cockpit.

Can I put both pumps on the same hose, i.e. can I pull
water through an electric (rule) pump when using the
manual, and can I push water through the membrane
pump with the rule?

If not, what is the next best/simplest setup?

Thanks for help and suggestions,

They can physically be plumbed in line but it's a bad idea as it drastically
restricts the flow and, more important, one problem could affect both pumps,
leaving you unable to pump out.

Although there are some electric pumps with integral auto switches I always
prefer separate simple float switches wired through a dedicated on/off/auto
switch, connected directly (via a fuse but not through the isolator) to a
domestic battery. Although it slightly restricts flow rate, I always fit a
non-return valve in the outlet to the skin fitting to avoid any chance of
back feed when heeled.

Graham.